Keysight Technologies E8257D Service Manual page 109

Troubleshooting
Troubleshooting Unlevels
Table 1-14
Signal Generator
Start
3.2 GHz
20 GHz
Table 1-15 E8257D Maximum Leveled Power (dBm)
Frequency 20 GHz Models
Std.
250 kHz to 3.2 GHz +13
250 kHz to 3.2 GHz +11
w/UNW
250 kHz to 3.2 GHz +13
b
w/1EH
250 kHz to 3.2 GHz +10
b
w/UNW + 1EH
E8257D/67D, E8663D PSG Signal Generators Service Guide
— Set Stop Frequency to 3.2 GHz
— Set Number of Points to 500 (skip this step if using ramp
sweep)
Spectrum Analyzer:
— Set Start Frequency to 225 kHz
— Set Stop Frequency to 3.25 GHz
— Set Reference Level to +30 dBm
— Set Display to Max Hold
b. Connect the RF output of the signal generator to the spectrum
analyzer. Measure and record the minimum power level.
c. Set the signal generator and spectrum analyzer start/stop
frequencies to the next start/stop frequencies in
step b above.
Spectrum Analyzer
Stop Start
20 GHz 3.15 GHz
Max. Freq. 20 GHz
d. If any of the frequency ranges do not produce power levels ≥ the
maximum leveled power shown in the tables below, set the signal
generator to the frequency with the lowest power level and measure
the power with a power meter. If the power level is low, troubleshoot
the RF path before proceeding.
40 GHz Models
1EA/ 1E1 1E1+ Std.
1EU 1EA/
1EU
+16 +11 +15 +9
+11 +10 +10 +9
+13 +11 +12 +9
+10 +9 +9 +9
Stop
20 GHz
Max. Freq.
a
50 & 67 GHz Models
1EA/ 1E1 1E1+ Std.
1EU 1EA/
1EU
+15 +7 +14 +5
+10 +7 +9 +5
+12 +7 +11 +5
+9 +7 +8 +5
Table 1-14. Repeat
1EA/ 1E1 1E1+
1EU 1EA/
1EU
+14 +3 +13
+9 +3 +8
+11 +3 +10
+8 +3 +7
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